DATE: MAY
28, TUESDAY, 2019.
TODAY, I
AM SEEING, WATCHING THE PEOPLE DO, DOING THINGS VERY GOOD.
THANK YOU
VERY MUCH.
GOOD DAYS,
PEACE AND HAPPINESS FOREVER IN USA , ASIA AND WORLDWIDE.
HIGHLY
APPRECIATED.
I.
I
AM STARTING BACK TO MY FIELDS, PLACES, SITUATIONS, CONDITIONS, CHANCES,
TERRITORIES, ETC. DURING MY TIME PERIOD, YEARS AROUND 1986-1987, 1988,
SEPTEMBER.
II.
LET
ME POSTING MY WORDS REGARDING MY TASKS AS SHOWN BELOW, DEPENDING THE WORDS
LANGUAGES I PICKED UP FROM MY RECORDS WHICH I KEPT SINCE YEAR 1979, EVEN
EARLIER YEARS.
III.
SEE.
DRAFT:
A.
STAR
THEATER/ ROSES SUITES ACOUSTICS
B.
C.
UNIVERSE
AAV & ASSOCIATES,INC.
D.
Consultants,
Engineers in acoustics and audio visual systems
E.
F.
July
30, 1985
G.
H.
KRT
& Co.
I.
777
3Rd Avenue
J.
Los
Angles, CA 34286
K.
L.
ttention:
Mr. Opekinoda
M.
N.
Re: Star Theater /Roses Suites
O.
P.
gentlemen:
Q.
R.
the
following are recommended mechanical noise control treatments for the project
following a review of 25 June
S.
1996
drawings.
T.
U.
1. Provide acoustically lined inlet ductwork
for minimum 10 feet for the following fans.
V.
a.
RF-C-1
W.
b.
RF-RS-1-1; also provide an elbow in the ductwork.
X.
2. The package unit above retail spaces;
AC-RS-1-1 and AC-Rs-1-2, will create sound levels approximating a Noise
Criterion (NC) level of 45. This is tolerable for most retail space, though it
could be disturbing to some
Y.
tenants.
Z.
We
recommend the first 10 feet of supply and return ductwork for AC-RS-1-1 be
constructed of 18 gauge sheet metal with angle reinforcement every 18”
O.C. Acoustic lining is to be provided per
specifications (extent of acoustical lining is outlined later in the letter).
AA.
3. All sound traps may be deleted from the main
air handling equipment. Acoustic lining,
layout and location
BB.of ductwork will provide necessary noise control. The
relatively long lengths of ductwork in MER space and penetrations into
non-critical areas suggest traps can be eliminated.
CC.4. supply
ductwork of AHU-6-3 is recommended to be relocated out of the training area
projected area. The duct is recommended
to run above less critical spaces adjacent to the training room.
DD.
EE. Should the duct have to remain
above the training room, We recommend this section be constructed of 18 gauge
sheet metal with angle reinforcing every 18” O.C. and be internally
acoustically lined.
FF.
GG.
KRT
& Co.
HH.
Ref:
Star theater/Roses suites
II.
June
30,1977
JJ.
Page
2
B.
5. The duct orientation for AHU-7-1 is
recommended to remain as shown with multiple elbows in the MER before
penetrating the floor.
6. Return fan RF-7-1 is located very close to
the atrium ceiling inlet. We anticipate
excessive noise transmission from the fan to the atrium.
7. Ductwork branches in the 7th floor MER are
recommended to be internally acoustically lined for a minimum
distance
of 10 feet from the 8th floor slab penetration.
Also exterior sound barrier wrapping is recommended for the 10 feet of
ductwork.
The
external wrapping is to be as specified in the KRT & Co. Master “noise
Control “ specification section for ductwork external sound proofing:
a. One inch thick fiberglass board material
wrapped around duct.
b. Lead sheet 1 Lb/SF weight final wrapping
around fiberglass.
All
penetrations through 8th floor are to be safed off for concern of noise
transmission. This must occur, we
believe, for fire safing concerns also, which will be sufficient for acoustical
concerns.
8. The air intake and discharge for the
emergency generator are recommended to incorporate sound attenuators in order
to control noise emission to the outside. The attenuators are to be similar to
Industrial Acoustical Company type #ms (3 foot long medium pressure drop
attenuators).
Guestrooms
do not locate directly above the generator, however, generator operation will
be audible in guestrooms in the area.
Providing acoustically isolated walls and ceiling will dramatically
reduce generator noise in the guestrooms. We can provide suggested construction
should it be determined that testing cannot be done without affecting guests.
Proper
timing of generator testing could eliminate the concern of noise transmission
to guestrooms. The generator
would have
to be tested with no one in the rooms on the first two or three floors in the
area of the equipment.
9. The toilet exhaust fan Tx-44-1 locates
relatively close to the penetration above guestrooms. We recommend
providing
at least 20 feet of acoustically lined duct between the fan and 44th floor slab
penetration.
!0. Air velocities through ductwork above
guestrooms is recommended to be minimum 1500 fpm. Regenerated noise at elbows
and fittings is a concern. We suggest
the ductwork layout provide minimum elbows; successive
90 degree
elbows are not recommended.
11. The recommended extent of internal
acoustical lining is as follows:
a. Supply:
all ductwork within equipment rooms but not less than 25 feet from fan.
b. Return:
all return ductwork in mechanical equipment rooms but not
C. less than 20 feet from fan; all
return and relief ductwork between fan and air handling unit and to outside
relief plenums.
KRT &
Co.
Ref: Star Theater /Roses suites
June 30,
1977
Page 3
c. Exhaust System: all ductwork upstream of exhaust fans in
mechanical equipment rooms but not less than 15 feet from fan; all ductwork
downstream of exhaust fans to plenum.
d. Plenums:
all plenums (mixing, return, relief, exhaust, intake); except to be 2”
thick lining.
e. Downstream of terminal units, air valves,
variable volume boxes for minimum 10 feet for units 1200 cfm and lower, and 15
feet for units above 1200 cfm. and lower, and 15 feet for units above 1200 cfm.
f. All supply linear plenums except to be 1/2”
lining.
g. Exhaust air boots for typical suites; Except
to be 1/2” lining.
h. where shown on drawing.
12. It is important that all air handling
systems be air balanced by reducing fan speed to the lowest possible in order
to supply design air quantities. This
ensures the lowest sound output possible for the systems.
13. We must review transformer equipment cuts
and bus/conduit layout in order to recommend proper noise
and
vibration isolation.
14. The theater cooling tower is presently
located in the 8th floor elevation with walls surrounding the tower with air
intake on the north side.
The
relative elevation along with the walls, places the tower out-of-sight of the
adjacent building to the east. In order
to
maintain proper acoustical separation, we recommend the east and north wall be
constructed at least to the top elevation of the cooling tower, and have no
openings.
Should
re-circulation of air be considered a problem,
we suggest ducting the intake to the to the north wall opening.
Should you
have any questions, kindly advise.
Very truly
yours,
ensures
the lowest sound output possible for the systems.
13. We must review transformer equipment cuts
and bus/conduit layout in order to recommend proper noise
and
vibration isolation.
14. The theater cooling tower is presently
located in the 8th floor elevation with walls surrounding the tower with air
intake on the north side.
The
relative elevation along with the walls, places the tower out-of-sight of the
adjacent building to the east. In order
to
maintain proper acoustical separation, we recommend the east and north wall be
constructed at least to the top elevation of the cooling tower, and have no
openings.
Should
re-circulation of air be considered a problem,
we suggest ducting the intake to the to the north wall opening.
Should you
have any questions, kindly advise.
Very truly
yours,
AAV &
Associates, INC.
Kameta
Solostov
Executive
Director
krid
cc: Mr. Tim Ampler
I AM PAI-PIN
CHEN, P.E.
JAROSBAUMBOLLES.COM.
PHILIP
PAI-PIN CHEN, P.E.
SYSKAHENNESSY.MOBI.
IEEE.MOBI.
PAIPINCHEN.COM.
FACEWORLDWIDE.COM.
05282019,
TUESDAY.
FILED.
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